On 02.04.2013, at 06:23, Richard Henderson wrote:
> Reviewed-by: Aurelien Jarno <aurel...@aurel32.net>
> Signed-off-by: Richard Henderson <r...@twiddle.net>
Is this faster than a load/store with std/ldbrx?
Alex
> ---
> tcg/ppc64/tcg-target.c | 35 +++++++++++++++++++++++++++++++++++
> tcg/ppc64/tcg-target.h | 2 +-
> 2 files changed, 36 insertions(+), 1 deletion(-)
>
> diff --git a/tcg/ppc64/tcg-target.c b/tcg/ppc64/tcg-target.c
> index d8131ec..1806364 100644
> --- a/tcg/ppc64/tcg-target.c
> +++ b/tcg/ppc64/tcg-target.c
> @@ -1706,6 +1706,40 @@ static void tcg_out_op (TCGContext *s, TCGOpcode opc,
> const TCGArg *args,
> }
> break;
>
> + case INDEX_op_bswap64_i64:
> + a0 = args[0], a1 = args[1], a2 = 0;
> + if (a0 == a1) {
> + a0 = 0;
> + a2 = a1;
> + }
> +
> + /* a1 = # abcd efgh */
> + /* a0 = rl32(a1, 8) # 0000 fghe */
> + tcg_out_rlw(s, RLWINM, a0, a1, 8, 0, 31);
> + /* a0 = dep(a0, rl32(a1, 24), 0xff000000) # 0000 hghe */
> + tcg_out_rlw(s, RLWIMI, a0, a1, 24, 0, 7);
> + /* a0 = dep(a0, rl32(a1, 24), 0x0000ff00) # 0000 hgfe */
> + tcg_out_rlw(s, RLWIMI, a0, a1, 24, 16, 23);
> +
> + /* a0 = rl64(a0, 32) # hgfe 0000 */
> + /* a2 = rl64(a1, 32) # efgh abcd */
> + tcg_out_rld(s, RLDICL, a0, a0, 32, 0);
> + tcg_out_rld(s, RLDICL, a2, a1, 32, 0);
> +
> + /* a0 = dep(a0, rl32(a2, 8), 0xffffffff) # hgfe bcda */
> + tcg_out_rlw(s, RLWIMI, a0, a2, 8, 0, 31);
> + /* a0 = dep(a0, rl32(a2, 24), 0xff000000) # hgfe dcda */
> + tcg_out_rlw(s, RLWIMI, a0, a2, 24, 0, 7);
> + /* a0 = dep(a0, rl32(a2, 24), 0x0000ff00) # hgfe dcba */
> + tcg_out_rlw(s, RLWIMI, a0, a2, 24, 16, 23);
> +
> + if (a0 == 0) {
> + tcg_out_mov(s, TCG_TYPE_I64, args[0], a0);
> + /* Revert the source rotate that we performed above. */
> + tcg_out_rld(s, RLDICL, a1, a1, 32, 0);
> + }
> + break;
> +
> default:
> tcg_dump_ops (s);
> tcg_abort ();
> @@ -1816,6 +1850,7 @@ static const TCGTargetOpDef ppc_op_defs[] = {
> { INDEX_op_bswap16_i64, { "r", "r" } },
> { INDEX_op_bswap32_i32, { "r", "r" } },
> { INDEX_op_bswap32_i64, { "r", "r" } },
> + { INDEX_op_bswap64_i64, { "r", "r" } },
>
> { -1 },
> };
> diff --git a/tcg/ppc64/tcg-target.h b/tcg/ppc64/tcg-target.h
> index bd011b8..d8e1820 100644
> --- a/tcg/ppc64/tcg-target.h
> +++ b/tcg/ppc64/tcg-target.h
> @@ -102,7 +102,7 @@ typedef enum {
> #define TCG_TARGET_HAS_ext32u_i64 1
> #define TCG_TARGET_HAS_bswap16_i64 1
> #define TCG_TARGET_HAS_bswap32_i64 1
> -#define TCG_TARGET_HAS_bswap64_i64 0
> +#define TCG_TARGET_HAS_bswap64_i64 1
> #define TCG_TARGET_HAS_not_i64 1
> #define TCG_TARGET_HAS_neg_i64 1
> #define TCG_TARGET_HAS_andc_i64 0
> --
> 1.8.1.4
>
